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Helium irradiation behavior of tungsten-niobium alloys under different ion energies.
- Source :
-
Fusion Engineering & Design . Jul2018, Vol. 132, p7-12. 6p. - Publication Year :
- 2018
-
Abstract
- Tungsten is a primary material in plasma-facing components (PFCs), but several disadvantages limit its application in fusion reactors. This work examined tungsten–niobium (W–Nb) alloys as potential PFC materials and investigated their response to low-energy helium ion irradiation. W–Nb powders were milled for 25 and 36 h, and the W–Nb samples were exposed to 50 and 80 eV helium ion irradiation with a flux of 1.5 × 10 22 ions/m 2 s at 1230 °C. The sample with a dense structure and obtained after a 25-h milling exhibited enhanced anti-irradiation performance. Sufficient energy can be provided to promote helium ion migration in the matrix, resulting in the formation of nanotendrils. Furthermore, in W–Nb alloys, the Nb-rich regions are more attractive to helium ions and thus provide protection to the tungsten matrix. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HELIUM
*TUNGSTEN
*NIOBIUM
*IRRADIATION
*ALLOYS
Subjects
Details
- Language :
- English
- ISSN :
- 09203796
- Volume :
- 132
- Database :
- Academic Search Index
- Journal :
- Fusion Engineering & Design
- Publication Type :
- Academic Journal
- Accession number :
- 129907851
- Full Text :
- https://doi.org/10.1016/j.fusengdes.2018.05.015